<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Title</title>
  </head>
  
  <body>
    <div id="app">
      <div>{{message}}</div> <!-- Hello -->
      <div v-pre>{{message}}</div> <!-- {{message}} -->
    </div>
  </body>
  
  <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
  
  <script>
    Vue.createApp({
      data() {
        return {
          message: 'Hello'
        };
      }
    }).mount('#app');
  </script>
</html>